使用TcpClient 获取邮件列表代码,CSharp代码库,德仔网

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【CSharp】使用TcpClient 获取邮件列表
作者:zgke / 发布于2014/7/29/ 365
使用方法 POP3 _Popt = new POP3("192.168.0.1", 110); DataTable _MailTable = _Popt.GetMailTable("zk", "zk");

	//使用方法
	POP3 _Popt = new POP3("192.168.0.1", 110);
	DataTable _MailTable = _Popt.GetMailTable("zk", "zk");

	

	using System;
	using System.Net.Sockets;
	using System.Net;
	using System.Security.Cryptography;
	using System.IO;
	using System.Data;

	namespace Zgke.Net
	{
	
	 /// <summary>
	 /// 获取邮件的类
	 /// </summary>
	 public class POP3
	 {
	 private string m_Address = "127.0.0.1";

	 private int m_Port = 110;

	 public POP3(string p_Address, int p_Port)
	 {
	 m_Address = p_Address;
	 m_Port = p_Port;
	 }

	 public DataTable GetMailTable(string p_Name,string p_PassWord)
	 {
	 POP3Client _Client = new POP3Client();
	 _Client.UserName = p_Name;
	 _Client.PassWord = p_PassWord;
	 _Client.Client = new TcpClient();
	 _Client.Client.BeginConnect(m_Address, m_Port, new AsyncCallback(OnConnectRequest), _Client);
	 while (!_Client.ReturnEnd)
	 {
	 System.Windows.Forms.Application.DoEvents();
	 }
	 if (_Client.Error.Length != 0) throw new Exception("错误信息!" + _Client.Error);
	 return _Client.MailDataTable;
	 }

	 private class POP3Client
	 {
	 public TcpClient Client;

	 public string UserName = "";

	 public string PassWord = "";

	 public bool ReturnEnd = false;

	 public DataTable MailDataTable = new DataTable();

	 public string Error = "";

	 public POP3Client()
	 {
	 MailDataTable.Columns.Add("NUM");
	 MailDataTable.Columns.Add("Size");
	 MailDataTable.Columns.Add("Form");
	 MailDataTable.Columns.Add("To");
	 MailDataTable.Columns.Add("Subject");
	 MailDataTable.Columns.Add("Date");
	 }

	 private int m_SendMessage = 0;
	 private int m_TOPIndex = 1;

	 public bool ReadEnd = false;

	
	 /// <summary>
	 /// 获取下一个登陆到获取列表需要的命令
	 /// </summary>
	 /// <param name="p_Value"></param>
	 /// <returns></returns>
	 public byte[] GetSendBytes(byte[] p_Value)
	 {
	 ReadEnd = false;
	 string _Value = System.Text.Encoding.ASCII.GetString(p_Value).Replace("/0", "");
	 if (_Value.IndexOf("+OK") == 0)
	 {
	 m_SendMessage++;
	 switch (m_SendMessage)
	 {
	 case 1:
	 return System.Text.Encoding.ASCII.GetBytes("USER " + UserName + "/r/n");
	 case 2:
	 return System.Text.Encoding.ASCII.GetBytes("PASS " + PassWord + "/r/n");
	 case 3:
	 ReadEnd = true;
	 return System.Text.Encoding.ASCII.GetBytes("LIST/r/n");
	 case 4:
	 string[] _List = _Value.Split(new char[] { '/r', '/n', '.' }, StringSplitOptions.RemoveEmptyEntries);
	 for (int i = 1; i != _List.Length; i++)
	 {
	 string[] _MaliSize = _List[i].Split(' ');
	 MailDataTable.Rows.Add(new object[] { _MaliSize[0], _MaliSize[1] });
	 }
	 if (MailDataTable.Rows.Count == 0)
	 {
	 ReturnEnd = true;
	 return new byte[0];
	 }
	 else
	 {
	 ReadEnd = true;
	 m_TOPIndex = 1;
	 return System.Text.Encoding.ASCII.GetBytes("TOP 1/r/n");
	 }
	 case 5:
	
	 System.Text.RegularExpressions.Regex _Regex = new System.Text.RegularExpressions.Regex(@"(?<=Date: ).*?(/r/n)+");
	 System.Text.RegularExpressions.MatchCollection _Collection = _Regex.Matches(_Value);
	 if (_Collection.Count != 0) MailDataTable.Rows[m_TOPIndex - 1]["Date"] = GetReadText(_Collection[0].Value);

	 System.Text.RegularExpressions.Regex _RegexFrom = new System.Text.RegularExpressions.Regex(@"(?<=From: ).*?(/r/n)+");
	 System.Text.RegularExpressions.MatchCollection _CollectionForm = _RegexFrom.Matches(_Value);
	 if (_CollectionForm.Count != 0) MailDataTable.Rows[m_TOPIndex - 1]["Form"] = GetReadText(_CollectionForm[0].Value);

	
	 System.Text.RegularExpressions.Regex _RegexTo = new System.Text.RegularExpressions.Regex(@"(?<=To: ).*?(/r/n)+");
	 System.Text.RegularExpressions.MatchCollection _CollectionTo = _RegexTo.Matches(_Value);
	 if (_CollectionTo.Count != 0) MailDataTable.Rows[m_TOPIndex - 1]["To"] = GetReadText(_CollectionTo[0].Value);

	 System.Text.RegularExpressions.Regex _RegexSubject = new System.Text.RegularExpressions.Regex(@"(?<=Subject: ).*?(/r/n)+");
	 System.Text.RegularExpressions.MatchCollection _CollectionSubject = _RegexSubject.Matches(_Value);
	 if (_CollectionSubject.Count != 0) MailDataTable.Rows[m_TOPIndex - 1]["Subject"] = GetReadText(_CollectionSubject[0].Value);

	
	 m_TOPIndex++;
	 m_SendMessage--;
	 ReadEnd = true;
	 if (m_TOPIndex > MailDataTable.Rows.Count)
	 {
	 ReturnEnd = true;
	 return System.Text.Encoding.ASCII.GetBytes("QUIT");
	 }
	 else
	 {
	 return System.Text.Encoding.ASCII.GetBytes("TOP " + m_TOPIndex.ToString() + "/r/n");
	 }
	 case 6:
	 break;

	 }
	 }
	 Error = _Value;
	 ReturnEnd = true;
	 return new byte[0];
	 }

	 /// <summary>
	 /// 转换文字里的字符集
	 /// </summary>
	 /// <param name="p_Text"></param>
	 /// <returns></returns>
	 public string GetReadText(string p_Text)
	 {
	 System.Text.RegularExpressions.Regex _Regex = new System.Text.RegularExpressions.Regex(@"(?<=/=/?).*?(?=/?/=)+");
	 System.Text.RegularExpressions.MatchCollection _Collection = _Regex.Matches(p_Text);
	 string _Text = p_Text;
	 foreach (System.Text.RegularExpressions.Match _Match in _Collection)
	 {
	 string _Value = "=?" + _Match.Value + "?=";
	 if (_Value[0] == '=')
	 {
	 string[] _BaseData = _Value.Split('?');
	 if (_BaseData.Length == 5)
	 {
	 System.Text.Encoding _Coding = System.Text.Encoding.GetEncoding(_BaseData[1]);
	 _Text = _Text.Replace(_Value, _Coding.GetString(Convert.FromBase64String(_BaseData[3])));
	 }
	 }
	 else
	 {
	 }
	 }
	 return _Text;
	 }
	 }
	
	 /// <summary>
	 /// 连接事件
	 /// </summary>
	 /// <param name="ar"></param>
	 private void OnConnectRequest(IAsyncResult ar)
	 {
	 POP3Client _Client = (POP3Client)ar.AsyncState;
	 byte[] _ReadBytes =new byte[0];
	 _Client.Client.Client.BeginReceive(_ReadBytes, 0, 0, SocketFlags.None, new AsyncCallback(OnWrite), _Client);
	 }

	 /// <summary>
	 /// 连接事件
	 /// </summary>
	 /// <param name="ar"></param>
	 private void OnSend(IAsyncResult ar)
	 {
	 POP3Client _Client = (POP3Client)ar.AsyncState;
	 byte[] _ReadBytes = new byte[0];
	 _Client.Client.Client.BeginReceive(_ReadBytes, 0, 0, SocketFlags.None, new AsyncCallback(OnWrite), _Client);
	 }

	 /// <summary>
	 /// 连接事件
	 /// </summary>
	 /// <param name="ar"></param>
	 private void OnWrite(IAsyncResult ar)
	 {
	 POP3Client _Client = (POP3Client)ar.AsyncState;
	 byte[] _WriteBytes = new byte[_Client.Client.Client.ReceiveBufferSize];
	 _Client.Client.Client.Receive(_WriteBytes);
	 if (_Client.ReadEnd) _WriteBytes = ReadEnd(_WriteBytes, _Client);
	 byte[] _SendBytes = _Client.GetSendBytes(_WriteBytes);
	 if (_SendBytes.Length == 0) return;
	 _Client.Client.Client.BeginSend(_SendBytes, 0, _SendBytes.Length, SocketFlags.None, new AsyncCallback(OnSend), _Client);
	 }

	 /// <summary>
	 /// 获取知道获取到. 否则一直获取数据
	 /// </summary>
	 /// <param name="p_Value"></param>
	 /// <returns></returns>
	 private byte[] ReadEnd(byte[] p_Value,POP3Client p_Client)
	 {
	 if (System.Text.Encoding.ASCII.GetString(p_Value).IndexOf("/r/n./r/n") != -1) return p_Value;
	 MemoryStream _Stream = new MemoryStream();
	 _Stream.Write(p_Value, 0, p_Value.Length);
	 while (true)
	 {
	 byte[] _WriteBytes = new byte[p_Client.Client.ReceiveBufferSize];
	 p_Client.Client.Client.Receive(_WriteBytes);
	 _Stream.Write(_WriteBytes, 0, _WriteBytes.Length);
	 System.Threading.Thread.Sleep(100);
	 if (System.Text.Encoding.ASCII.GetString(_WriteBytes).IndexOf("/r/n./r/n") != -1) return _Stream.ToArray();
	 }
	 return _Stream.ToArray();
	 }
	
	 }
	}
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